Study by small-angle scattering of x-rays of concentration fluctuations in some metallic glasses

For the study of the short-range order of metallic glasses, the small-angle scattering experiment with X-ray was carried out. The scattered intensity was recorded by means of a position-sensitive detector, which can be rotated around an axis centered on the sample. The high sensitivity of this technique allows in-situ measurement. The heating of the samples was carried out. In the metal-metal alloys, the presence of S.A.S. maximum is observed, which increases and shifts towards the angular origin when these alloys are heated. The same behavior was observed when heating the sputtered metal-metalloid Pd80-Si20 alloy. The results on the metal-metal Cu60-Zr40 amorphous alloy are presented. By the accurate measurement of Laue intensity, it can be said that the sputtered alloy is a little more disordered than the alloy quenched from the liquid state. The sputtered alloy undergoes a transformation with rising temperature. (Kato, T.)